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Vishay General Semiconductor - Diodes Division SM15T30CAHE3/9AT
- Part No.:
- SM15T30CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SM15T30CAHE3/9AT.pdf
- Description:
- TVS DIODE 25.6VWM 41.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,852
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Product details
Overview
SM15T30CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) in SMC (DO-214AB) package, rated for 1500 W peak pulse power (10/1000 μs), 30 V standoff voltage (VWM), and clamping voltage of 41.5 V at 36 A peak pulse current. It provides robust protection for automotive-grade signal lines and power rails against lightning-induced and inductive-switching transients.
For engineers reviewing the SM15T30CAHE3/9AT datasheet, SM15T30CAHE3/9AT pinout, SM15T30CAHE3/9AT application, or SM15T30CAHE3/9AT equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 30 V VWM, 41.5 V VC at 36 A, and SMC package thermal performance under high-energy surge conditions.
Technical Context
The SM15T30CAHE3/9AT operates as a bidirectional avalanche diode with symmetrical breakdown characteristics in both polarities, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage and repeatable clamping across temperature.
Designed for high-impedance source environments, it limits transient energy by clamping within 41.5 V while sustaining 36 A peak pulse current (10/1000 μs), with thermal resistance RθJA = 75 °C/W and maximum junction temperature of 150 °C. Failure mode under overstress is short circuit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating window for protected circuitry. |
| VBR min / max | 28.5 V / 31.5 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 41.5 V at 36 A - Clamped voltage during 10/1000 μs surge; determines maximum stress on downstream components. |
| PPPM | 1500 W - Peak pulse power handling capability; supports protection against lightning surges per IEC 61000-4-5. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient; informs PCB pad design for sustained power dissipation. |
| AEC-Q101 | Qualified - Meets stress-test requirements for automotive electronics reliability, including temperature cycling and HTRB. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. No polarity marking for bidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | One terminal of bidirectional avalanche junction | Symmetrical conduction path; connects to either side of protected line (e.g., differential pair or AC signal). |
| Cathode | Other terminal of bidirectional avalanche junction | Electrically identical to Anode in CA-series; no functional distinction-device is fully symmetric. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV) surge testing when combined with appropriate source impedance. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Low clamping ratio (VC/VWM = 1.38) | Minimizes overvoltage exposure to protected ICs such as CAN transceivers or microcontrollers during transients. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
| Glass-passivated junction | Ensures long-term stability of leakage current (<1 μA at VWM) and clamping voltage across temperature and life cycle. |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair in vehicle ECUs against load-dump and ESD events. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector interface to limit transient excursions. Use Value: Maintains signal integrity below 41.5 V during 36 A surges, preventing CAN transceiver latch-up or damage. |
Use Scenario: Shielding 4–20 mA or 0–10 V analog outputs from motor drive noise and relay switching spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing fast-rising transients before reaching ADC input or op-amp buffer. Use Value: Limits voltage excursion to ≤41.5 V, preserving measurement accuracy and avoiding saturation of front-end amplifiers. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers connected to external cabling exposed to induced surges. IC Role / Device Role / Timing Role: Primary surge suppression element on data line, upstream of common-mode chokes and filtering. Use Value: Absorbs up to 1500 W energy without degradation, meeting GR-1089-CORE telecom surge immunity requirements. |
Use Scenario: Input-stage transient protection for AC-DC adapters used in smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: First-line defense against mains-borne surges entering via primary-side rectifier or secondary-side DC output. Use Value: Clamps 30 V rail to 41.5 V during 10/1000 μs events, preventing overvoltage shutdown or capacitor rupture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA | Lower peak power rating (400 W), same VWM (30 V), higher VC (48.4 V at 8.3 A), SMA package (smaller thermal mass). | Not suitable for IEC 61000-4-5 Level 4; limited to lower-energy threats like ESD or local switching noise. | Select SMAJ30CA only when board space is constrained and surge threat level is ≤1 kV. |
| 1.5KE30CA | Higher peak power (1500 W), same VWM/VC, but DO-201 package (axial leaded, through-hole, larger footprint). | Requires manual or wave soldering; incompatible with automated SMT lines and high-density layouts. | Choose 1.5KE30CA only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMAJ30CA and 1.5KE30CA, SM15T30CAHE3/9AT uniquely combines AEC-Q101 qualification, SMC surface-mount form factor, and full 1500 W surge capability-making it the only option qualified for production automotive SMT applications requiring robust bidirectional clamping at 30 V.
Availability
SM15T30CAHE3/9AT is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, telecom line cards, and consumer power adapter designs requiring stable component supply with AEC-Q101 assurance and SMT manufacturability.
Supply support for SM15T30CAHE3/9AT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The SM15T Series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where failure due to voltage surges must be prevented without compromising signal integrity.
FAQ
What does the "CA" suffix indicate in SM15T30CAHE3/9AT?
The "CA" suffix denotes a bidirectional configuration: SM15T30CAHE3/9AT conducts identically in both polarities, making it suitable for protecting AC signals, differential buses (e.g., CAN, RS-485), or floating nodes. Unlike unidirectional "A" variants, it has no cathode marking and exhibits matched breakdown voltage in forward and reverse directions-critical for symmetric transient suppression without polarity constraints.
Is SM15T30CAHE3/9AT suitable for IEC 61000-4-5 surge testing?
Yes, SM15T30CAHE3/9AT is rated for 1500 W peak pulse power with a 10/1000 μs waveform, aligning with IEC 61000-4-5 Level 4 (4 kV) testing when implemented with appropriate PCB layout and source impedance. Its 41.5 V clamping voltage at 36 A ensures protected circuits remain within safe operating limits during standardized surge events.
How does the HE3 suffix affect SM15T30CAHE3/9AT's qualification status?
The HE3 suffix confirms that SM15T30CAHE3/9AT is AEC-Q101 qualified-validated for automotive use through stress tests including temperature cycling, highly accelerated life testing (HALT), and unbiased highly accelerated stress testing (UHAST). This distinguishes it from commercial-grade E3/M3 variants and assures reliability in under-hood and chassis-mounted applications.
What is the thermal performance of SM15T30CAHE3/9AT on standard PCB pads?
When mounted on 0.31" x 0.31" (8.0 mm x 8.0 mm) copper pads per terminal, SM15T30CAHE3/9AT achieves RθJA = 75 °C/W. This allows sustained 6.5 W power dissipation at 50 °C ambient, supporting repeated surge events without thermal runaway-provided minimum pad layout per Vishay document 88380 is followed.
Does SM15T30CAHE3/9AT have polarity markings on the package?
No, SM15T30CAHE3/9AT has no polarity markings because it is a bidirectional device-the anode and cathode terminals are functionally identical. The SMC (DO-214AB) case is symmetric, and orientation during placement does not affect electrical performance. This simplifies automated assembly and eliminates risk of reverse installation.
SM15T30CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- SM15T, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 25.6V
- Voltage - Breakdown (Min):
- 28.5V
- Voltage - Clamping (Max) @ Ipp:
- 41.5V
- Current - Peak Pulse (10/1000µs):
- 36A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SM15T30CAHE3/9AT FAQ
1.How can I place an order for SM15T30CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SM15T30CAHE3/9AT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SM15T30CAHE3/9AT reliable?
The price and inventory of SM15T30CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM15T30CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SM15T30CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM15T30CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM15T30CAHE3/9AT?
SM15T30CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM15T30CAHE3/9AT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SM15T30CAHE3/9AT?
For technical support, including SM15T30CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM15T30CAHE3/9AT requirements.
6.How does Aetrix verify that SM15T30CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SM15T30CAHE3/9AT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SM15T30CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SM15T30CAHE3/9AT?
All SM15T30CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SM15T30CAHE3/9AT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SM15T30CAHE3/9AT part is unused and in its original packaging.
Return procedure for SM15T30CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM15T30CAHE3/9AT Tags
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